Adding 2 digit numbers

Front

What is addition?

Back

Addition is the process of finding the total or sum by combining two or more numbers.

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CCSS.1.OA.A.1

Front

What is a two-digit number?

Back

A two-digit number is a number that has two places, such as 10 to 99.

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CCSS.1.NBT.A.1

Front

What does the '+' symbol mean?

Back

The '+' symbol means 'plus' and is used to indicate addition.

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CCSS.5.OA.A.1

CCSS.5.OA.A.2

Front

What is the sum of 67 and 8?

Back

75

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CCSS.2.NBT.B.6

Front

What is the sum of 35 and 35?

Back

70

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CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

What is the sum of 14 and 77?

Back

91

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CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

How do you add two-digit numbers?

Back

Align the numbers by place value (tens and ones) and add each column starting from the right.

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CCSS.2.NBT.B.6

Front

What is carrying in addition?

Back

Carrying is when the sum of a column is 10 or more, and you write down the last digit and carry over the first digit to the next column.

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CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

What is the first step in adding two-digit numbers?

Back

The first step is to write the numbers one under the other, aligning them by place value.

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CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

What is a missing number in addition?

Back

A missing number is a number that needs to be found to complete an addition equation.

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CCSS.1.OA.A.1